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Supplemental Comprehensive Income Disclosures (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Supplemental Comprehensive Income Disclosures [Abstract] |  |
Unrealized holding gains on securities arising during the period | $ (4,275) | $ 99
Non-credit related gains (losses) on securities not expected to be sold | 1,864 | 1,498
Reclassification adjustment for gains on securities included in net income | (4) | 0
Total available for sale securities | (2,415) | 1,597
Total other comprehensive income | (2,415) | 1,597
Unrealized holding gains on securities arising during the period | 1,495 | (34)
Non-credit related gains (losses) on securities not expected to be sold | (652) | (524)
Reclassification adjustment for gains on securities included in net income | 1 | 0
Total available for sale securities | 844 | (558)
Total other comprehensive income | 844 | (558)
Unrealized holding gains on securities arising during the period | (2,780) | 65
Non-credit related gains (losses) on securities not expected to be sold | 1,212 | 974
Reclassification adjustment for gains on securities included in net income | (3) | 0
Total available for sale securities | (1,571) | 1,039
Other comprehensive income (loss) | $ (1,571) | $ 1,039

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